1/*
2 * drivers/macintosh/mac_hid.c
3 *
4 * HID support stuff for Macintosh computers.
5 *
6 * Copyright (C) 2000 Franz Sirl.
7 *
8 * This file will soon be removed in favor of an uinput userspace tool.
9 */
10
11#include <linux/init.h>
12#include <linux/proc_fs.h>
13#include <linux/sysctl.h>
14#include <linux/input.h>
15#include <linux/module.h>
16
17
18static struct input_dev *emumousebtn;
19static int emumousebtn_input_register(void);
20static int mouse_emulate_buttons;
21static int mouse_button2_keycode = KEY_RIGHTCTRL;	/* right control key */
22static int mouse_button3_keycode = KEY_RIGHTALT;	/* right option key */
23static int mouse_last_keycode;
24
25#if defined(CONFIG_SYSCTL)
26/* file(s) in /proc/sys/dev/mac_hid */
27static ctl_table mac_hid_files[] = {
28	{
29		.ctl_name	= DEV_MAC_HID_MOUSE_BUTTON_EMULATION,
30		.procname	= "mouse_button_emulation",
31		.data		= &mouse_emulate_buttons,
32		.maxlen		= sizeof(int),
33		.mode		= 0644,
34		.proc_handler	= &proc_dointvec,
35	},
36	{
37		.ctl_name	= DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,
38		.procname	= "mouse_button2_keycode",
39		.data		= &mouse_button2_keycode,
40		.maxlen		= sizeof(int),
41		.mode		= 0644,
42		.proc_handler	= &proc_dointvec,
43	},
44	{
45		.ctl_name	= DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,
46		.procname	= "mouse_button3_keycode",
47		.data		= &mouse_button3_keycode,
48		.maxlen		= sizeof(int),
49		.mode		= 0644,
50		.proc_handler	= &proc_dointvec,
51	},
52	{ .ctl_name = 0 }
53};
54
55/* dir in /proc/sys/dev */
56static ctl_table mac_hid_dir[] = {
57	{
58		.ctl_name	= DEV_MAC_HID,
59		.procname	= "mac_hid",
60		.maxlen		= 0,
61		.mode		= 0555,
62		.child		= mac_hid_files,
63	},
64	{ .ctl_name = 0 }
65};
66
67/* /proc/sys/dev itself, in case that is not there yet */
68static ctl_table mac_hid_root_dir[] = {
69	{
70		.ctl_name	= CTL_DEV,
71		.procname	= "dev",
72		.maxlen		= 0,
73		.mode		= 0555,
74		.child		= mac_hid_dir,
75	},
76	{ .ctl_name = 0 }
77};
78
79static struct ctl_table_header *mac_hid_sysctl_header;
80
81#endif /* endif CONFIG_SYSCTL */
82
83int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
84{
85	switch (caller) {
86	case 1:
87		/* Called from keyboard.c */
88		if (mouse_emulate_buttons
89		    && (keycode == mouse_button2_keycode
90			|| keycode == mouse_button3_keycode)) {
91			if (mouse_emulate_buttons == 1) {
92				input_report_key(emumousebtn,
93						 keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
94						 down);
95				input_sync(emumousebtn);
96				return 1;
97			}
98			mouse_last_keycode = down ? keycode : 0;
99		}
100		break;
101	}
102	return 0;
103}
104
105static int emumousebtn_input_register(void)
106{
107	int ret;
108
109	emumousebtn = input_allocate_device();
110	if (!emumousebtn)
111		return -ENOMEM;
112
113	emumousebtn->name = "Macintosh mouse button emulation";
114	emumousebtn->id.bustype = BUS_ADB;
115	emumousebtn->id.vendor = 0x0001;
116	emumousebtn->id.product = 0x0001;
117	emumousebtn->id.version = 0x0100;
118
119	emumousebtn->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
120	emumousebtn->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
121	emumousebtn->relbit[0] = BIT(REL_X) | BIT(REL_Y);
122
123	ret = input_register_device(emumousebtn);
124	if (ret)
125		input_free_device(emumousebtn);
126
127	return ret;
128}
129
130static int __init mac_hid_init(void)
131{
132	int err;
133
134	err = emumousebtn_input_register();
135	if (err)
136		return err;
137
138#if defined(CONFIG_SYSCTL)
139	mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
140#endif /* CONFIG_SYSCTL */
141
142	return 0;
143}
144
145device_initcall(mac_hid_init);
146